JP3046237B2 - Lubricating oil purification cooling method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating oil purification system for cooling a lubricating oil circulating in a hydraulic system including a hydraulic device such as an oil lubricating vacuum pump and removing impurities contained in the lubricating oil. The present invention relates to a cooling method and device.

[0002]

2. Description of the Related Art For example, in the process of assembling a vehicle, when a radiator liquid is injected into a radiator or a brake fluid is injected into a brake device, air is evacuated from a work and a piping system, and radiator liquid is injected. A vacuum pump is used to reduce the time, check the state of the piping, and the like.

FIG. 3 shows a hydraulic system including a vacuum pump devised by the present applicant.

[0004] The hydraulic system 1 comprises a vacuum pump 2,
The work 3 includes an injection gun 5 for evacuating the work 3 and injecting a radiator liquid supplied through a radiator liquid discharge pump 4 into the work 3, and an oil tank 6 for storing the lubricating oil discharged from the vacuum pump 2. .

[0005] A first hose 7 a is interposed between the vacuum pump 2 and the injection gun 5, while a lubricating oil discharged from the vacuum pump 2 is interposed between the vacuum pump 2 and the oil tank 6. A second hose 7b and a third hose 7c are connected in parallel, and a fourth hose 7d that sucks the lubricating oil stored in the oil tank 6 and supplies the lubricating oil to the vacuum pump 2 Is provided. The vacuum pump 2 is provided with a radiator 8 for cooling lubricating oil, which has been heated to a high temperature by exhausting water vapor into the atmosphere, to a predetermined temperature.
Is attached.

[0006]

However, in the above-described hydraulic system 1 according to the prior art, dusts and moisture in the work 3 and a small amount of impurities such as a radiator liquid are injected over a long period of use. The lubricating oil circulating in the vacuum pump 2 via the gun 5 is mixed into the lubricating oil, and the impurities such as the dust are discharged to the oil tank 6 together with the lubricating oil, and eventually accumulated at the bottom of the oil tank 6.

Further, rust generated in the vacuum pump 2 and the radiator 8 is mixed into the lubricating liquid, and the rust is eventually accumulated in the oil tank 6.

As described above, dust and dirt are contained in the oil tank 6.
Accumulation of various impurities such as moisture, radiator liquid, and rust contaminates the lubricating oil circulating between the vacuum pump 2 and the oil tank 6, and reduces the suction capacity of the vacuum pump 2.

Therefore, the maintenance work for replacing the contaminated lubricating oil with new lubricating oil must be performed frequently, so that the cost increases and the hydraulic system must be stopped every time the maintenance work is performed. Therefore, there is a problem that production efficiency is reduced.

The relatively high temperature (about 80 ° C. or higher) lubricating oil discharged from the vacuum pump 2 to the oil tank 6 is circulated to the vacuum pump without cooling, so that the capacity of the vacuum pump is reduced. There is a problem of lowering.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. By cleaning and cooling lubricating oil, the number of maintenance operations can be reduced, thereby reducing costs and improving production efficiency. It is an object of the present invention to provide a method and an apparatus for purifying and cooling a lubricating oil capable of improving the lubrication.

[0012]

In order to achieve the above object, the present invention provides a hydraulic device, and a tank for supplying lubricating oil to the hydraulic device and for storing lubricating oil discharged from the hydraulic device. A method for cooling a lubricating oil circulating in a hydraulic system and removing impurities contained in the lubricating oil, wherein the lubricating oil discharged from the hydraulic device is temporarily stored in a lubricating oil receiving tank. A step of precipitating impurities contained in the lubricating oil, and a step of dispersing the water contained in the lubricating oil into the atmosphere through an opening provided in the lubricating oil receiving tank, and after the precipitate is removed. The cooling means cools the lubricating oil flowing out of the lubricating oil receiving tank and stored in the tank, and the lubricating oil stored in the tank through a filtering means disposed in the tank. Characterized by and a step for supplying the hydraulic equipment spend.

Further, the present invention cools lubricating oil circulating in a hydraulic circuit including a hydraulic device, a tank for supplying lubricating oil to the hydraulic device and storing a lubricating oil discharged from the hydraulic device, and A device for removing impurities contained in the lubricating oil, wherein the device is provided in the tank and temporarily stores the lubricating oil discharged from the hydraulic device, thereby precipitating the impurities contained in the lubricating oil. The lubricating oil receiving tank to be recovered and the lubricating oil from which the sediment flowing out of the lubricating oil receiving tank is removed are stored in a tank having a two-tank structure,
Cooling means for cooling the lubricating oil stored in the tank by a cooling medium flowing between the two tanks, and communicating the atmosphere with a chamber closed in the tank and storing the lubricating oil in the lubricating oil receiving tank. An opening for dispersing the moisture contained in the lubricating oil thus obtained into the atmosphere is provided.

In this case, it is preferable to provide a filter in the tank for filtering the lubricating oil stored in the tank and supplying the cleaned lubricating oil to the hydraulic equipment. Further, it is preferable that the tank has an inner wall tank and an outer wall tank, the inner wall tank is formed of an aluminum material having good heat conduction properties, and the outer wall tank is formed of a heat insulating material.

According to the present invention, the lubricating oil discharged from the hydraulic equipment is temporarily stored in the lubricating oil receiving tank, so that the impurities contained in the lubricating oil precipitate and are provided in the lubricating oil receiving tank. The moisture contained in the lubricating oil is radiated into the atmosphere through the opening. Subsequently, the lubricating oil from which sediment flowing out of the lubricating oil receiving tank has been removed is stored in a tank, and the lubricating oil stored in the tank is cooled through cooling means, and the lubricating oil is stored in the tank. The lubricating oil filtered through the disposed filtering means is supplied to the hydraulic equipment.

As described above, since the cleaned and cooled lubricating oil is circulated and supplied to the hydraulic equipment, the number of maintenance operations for the hydraulic equipment can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a lubricating oil purifying and cooling method according to the present invention will be described below in detail with reference to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a lubricating oil purifying and cooling apparatus according to an embodiment of the present invention. The lubricating oil purification and cooling device 10 includes a vacuum pump (hydraulic device) 16 to which a driving force of a motor 14 is transmitted via a timing belt 12 and evacuates a work via an injection gun (not shown), and a vacuum pump. Tank 1 that is formed separately from tank 16 and stores lubricating oil discharged from vacuum pump 16
8 is provided.

The tank 18 comprises a double tank, for example, an inner wall tank 20 made of a metal material having high thermal conductivity such as aluminum and an outer wall tank 22 made of a heat insulating material such as glass wool. Is done. Between the inner wall tank 20 and the outer wall tank 22, there is provided a cooling water circulation passage 24 for flowing cooling water supplied from a cooling water supply source (not shown) in the direction of the arrow, and lubricating oil stored in the inner wall tank 20 is provided. Functions as cooling means, and serves as the cooling water circulation passage 24.
The cooling water is circulated. The cooling water circulation passage 24 has first to first opening / closing openings for the cooling water circulation passage 24.
Third on-off valves 26a to 26c are provided. The cooling medium is not limited to cooling water, and the lubricating oil may be cooled using, for example, air, gas, oil, or the like.

Between the vacuum pump 16 and the tank 18, the lubricating oil discharged from the vacuum pump 16 is supplied to the tank 1
A first conduit 28a and a second conduit 28b, which are introduced into
A third conduit 30 for supplying the lubricating oil stored in the inner wall tank 20 to the vacuum pump 16 is provided. Therefore, after the lubricating oil discharged from the vacuum pump 16 is introduced into the tank 18 through the first pipe 28a and the second pipe 28b,
It is configured to recirculate to the vacuum pump 16 via the third conduit 30. The vacuum pump 16 is provided with a radiator 32 for exhausting water vapor into the atmosphere.

A chamber 34 for storing the lubricating oil discharged from the vacuum pump 16 is formed in the inner wall tank 20 constituting the tank 18, and the chamber 34 is closed by a lid member 36. The ends of the first conduit 28a and the second conduit 28b are provided at a predetermined distance from the upper surface of the lid member 36, and the lid member 36 in which the first conduit 28a and the second conduit 28b are close to each other. An opening 38 for introducing the lubricating oil that has flowed out from the ends of the first conduit 28a and the second conduit 28b into the chamber 34 is formed at a predetermined portion (see FIG. 2). The opening 38 has a function of dispersing the moisture contained in the lubricating oil into the atmosphere, as described later.

The ends of the first conduit 28a and the second conduit 28b are directly fitted into a hole (not shown) of the cover member 36, and an opening (see FIG. (Not shown).

On the lower surface of the lid member 36 facing the chamber 34, a cylindrical lubricating oil receiving tank 42 is removably mounted via a flange 40 which is screwed. Are formed with a plurality of small holes 44 along the outer peripheral surface. A hole 46 for holding the third conduit 30 is defined in the lid member 36, and a chamber 3 of the third conduit 30 is formed.
Filter (filtration means) surrounding part inserted in 4
48 are provided. The filter 48 is formed in a mesh shape using, for example, a stainless steel material.

The lubricating oil purifying and cooling apparatus 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effect of the apparatus will be described.

First, by transmitting the driving force of the motor 14 to the vacuum pump 16 via the timing belt 12, the vacuum pump 16 is energized, and the work is evacuated via an injection gun (not shown).

The lubricating oil circulated through the vacuum pump 16 and discharged from the vacuum pump 16 is discharged into the tank 18 via the first pipe 28a and the second pipe 28b. When the lubricating oil flows out from the end portions of the first conduit 28a and the second conduit 28b toward the opening 38 of the lid member 36, the moisture contained in the lubricating oil removes the first conduit 28a and The end of the second conduit 28b and the upper surface of the lid member 36 are radiated into the atmosphere as water vapor through a space that is separated. Further, the moisture contained in the lubricating oil flowing out from the end portions of the first pipe line 28a and the second pipe line 28b and stored in the lubricating oil receiving tank 42 passes through the opening 38 of the lid member 36 and becomes water vapor. Dissipated into the atmosphere as As a result, moisture mixed in when the vacuum is drawn is removed from the lubricating oil.

Subsequently, the lubricating oil discharged from the opening 38 of the lid member 36 is temporarily stored in a cylindrical lubricating oil receiving tank 42, and the lubricating oil stored in the lubricating oil receiving tank 42 is Flows out to the inner wall tank 20 through a plurality of small holes 44 formed on the upper side. Therefore, impurities such as dust contained in the lubricating oil discharged from the vacuum pump 16 are accumulated as a precipitate at the bottom of the lubricating oil receiving tank 42 temporarily stored,
Only the lubricating oil from which sediments have been removed and cleaned is small holes 4
4 to the inner wall tank 20. The sediment accumulated at the bottom of the lubricating oil receiving tank 42 can be easily discarded by removing the screwed lubricating oil receiving tank 42 from the lid member 36.

The lubricating oil flowing out through the small holes 44 of the lubricating oil receiving tank 42 and stored in the inner wall tank 20 is supplied to the cooling water circulation passage 2.
4 is cooled to a predetermined temperature under the action of cooling water flowing through the cooling water.
The lubricating oil can be efficiently cooled by flowing the cooling water from the lower side to the upper side of the tank in the direction of the arrow. The cooling water may flow from the upper side to the lower side in the direction opposite to the arrow.

The lubricating oil that has been cleaned and cooled as described above is further purified by the filtering action of the filter 48 and then supplied to the vacuum pump 16 via the third conduit 30.

In the present embodiment, the first method of discharging the lubricating oil
Ends of pipe 28a and second pipe 28b and lid member 36
A space is formed between the lubricating oil and the water contained in the lubricating oil to diffuse into the atmosphere to remove the water in the lubricating oil, and to form a lubricating oil receiving tank 42 for precipitating impurities. With the filter 48 operated, it is possible to obtain a purified lubricating oil from which various impurities such as dust, radiator liquid, and rust have been removed. The relatively high temperature (about 80 ° C. or higher) lubricating oil discharged from the vacuum pump 16 is cooled to a predetermined temperature (about 80 ° C.) by cooling water flowing through a cooling water circulation passage 24 formed between the inner wall tank 20 and the outer wall tank 22. (About 35 ° C. to 40 ° C.).

For example, the temperature of the lubricating oil is detected by a thermostat (not shown) provided in the tank 18, and the valves of the first on-off valve 26a and the third on-off valve 26c are detected through detection signals derived from the thermostat. By controlling an electromagnetic valve (not shown) for opening and closing the body, the cooling temperature of the lubricating oil can be set to a predetermined temperature.

Accordingly, since the cleaned and cooled lubricating oil circulates in the vacuum pump 16 to perform a suction function, the suction capacity of the vacuum pump 16 is prevented from being reduced, and the vacuum pump 16 Can be dramatically improved.

Further, it is possible to reduce the number of maintenance operations involved in replacing the lubricating oil circulating in the vacuum pump 16 and replacing the mist trap, thereby reducing the cost.

Further, as the number of maintenance operations is reduced, the number of times the lubricating oil purification and cooling device 10 is stopped is also reduced, so that production efficiency can be improved.

In this embodiment, the tank 18 is a double tank, and the lubricating oil is cooled through a cooling medium supplied from the outside. However, the present invention is not limited to this. As a cooling means for the lubricating oil, for example, a pipe (not shown) made of aluminum, copper, or the like having good thermal conductivity is disposed in a meandering manner on an inner wall surface or a hollow portion in the tank 18. Circulating a cooling medium through the tube,
Alternatively, cooling may be performed using another heat exchanger.

[0036]

According to the present invention, the following effects can be obtained.

That is, by purifying and cooling the lubricating oil circulating in the hydraulic system including the hydraulic equipment, for example, the number of maintenance operations associated with oil replacement, mist trap replacement, and the like can be reduced to reduce costs. ,
Production efficiency can be improved.

Further, for example, the durability of a hydraulic device including an oil-lubricated vacuum pump or the like can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a lubricating oil purification / cooling apparatus that performs a lubricating oil purification / cooling method according to the present invention.

FIG. 2 is a sectional view of a lubricating oil receiving tank constituting the lubricating oil purifying cooling device shown in FIG.

FIG. 3 is a schematic configuration diagram of a hydraulic system including a vacuum pump devised by the present applicant.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Lubricating oil purification cooling device 14 ... Motor 16 ... Vacuum pump 18 ... Tank 20 ... Inner wall tank 22 ... Outer wall tank 24 ... Cooling water circulation passage 28a, 28
b, 30 pipe line 32 radiator 34 chamber 36 cover member 38 opening 42 lubricating oil receiving tank 44 small hole 48 filter

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04B 39/02 F04B 39/16

Claims (6)

(57) [Claims] 1. A system for cooling lubricating oil circulating in a hydraulic system including a hydraulic device and a tank for supplying lubricating oil to the hydraulic device and for storing lubricating oil discharged from the hydraulic device, the lubricating oil being cooled. A method for removing impurities contained in the lubricating oil receiving device, wherein the lubricating oil discharged from the hydraulic device is temporarily stored in a lubricating oil receiving tank to precipitate impurities contained in the lubricating oil, A step of dispersing the moisture contained in the lubricating oil into the atmosphere through an opening provided in the tank, and after the sediment is removed, the sediment flows out of the lubricating oil receiving tank and is stored in the tank. Cooling the lubricating oil by a cooling means, filtering the lubricating oil stored in the tank through a filtering means disposed in the tank, and supplying the filtered oil to hydraulic equipment. Lubricant purifying cooling method of. 2. A method for cooling lubricating oil circulating in a hydraulic circuit including a hydraulic device and a tank for supplying lubricating oil to the hydraulic device and for storing lubricating oil discharged from the hydraulic device, the lubricating oil being cooled. A device for removing impurities contained in the lubricating oil, the lubricating oil being provided in the tank and temporarily storing the lubricating oil discharged from the hydraulic device, thereby precipitating and collecting the impurities contained in the lubricating oil. An oil receiving tank and the lubricating oil from which sediment flowing out of the lubricating oil receiving tank is removed is stored in a tank having a two-tank structure, and is stored in the tank by a cooling medium flowing between the two tanks. Cooling means for cooling the lubricating oil, and an opening for communicating the atmosphere closed with the chamber in the tank with the atmosphere, and for radiating moisture contained in the lubricating oil stored in the lubricating oil receiving tank to the atmosphere. To provide Lubricant purifier cooling apparatus characterized. 3. The lubricating apparatus according to claim 2, wherein a filter is provided in the tank for supplying the purified lubricating oil to the hydraulic equipment by filtering the lubricating oil stored in the tank. Oil purification cooling device. 4. The apparatus according to claim 2, wherein the tank has an inner wall tank and an outer wall tank, and the inner wall tank is formed of an aluminum material having good heat conduction characteristics, and the outer wall tank is thermally insulated. A lubricating oil purification cooling device characterized by being formed of a material. 5. An apparatus according to claim 2, wherein a plurality of small holes are formed along an outer peripheral surface on an upper side of the lubricating oil receiving tank, and are stored in the lubricating oil receiving tank. The lubricating oil purifying and cooling device, wherein the lubricating oil excluding the deposited sediment flows out into the tank through the small holes. 6. An apparatus according to claim 2, wherein said hydraulic device is an oil-lubricated vacuum pump.